import json, os, sys, base64, urllib.parse, urllib.request, urllib.error


def _cfg():
    return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))


def _inputs():
    return json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))


def _auth(cfg):
    raw = str(cfg.get("token", "")) + ":token"
    return "Basic " + base64.b64encode(raw.encode("utf-8")).decode("utf-8")


def request(method, path, cfg, params=None):
    url = str(cfg.get("base_url", "")).rstrip("/") + "/api" + path
    if params:
        clean = {k: v for k, v in params.items() if v not in (None, "")}
        if clean:
            url += "?" + urllib.parse.urlencode(clean)
    headers = {"Authorization": _auth(cfg), "Accept": "application/json", "X-Requested-By": "riposte"}
    req = urllib.request.Request(url, headers=headers, method=method)
    with urllib.request.urlopen(req, timeout=60) as r:
        raw = r.read()
        return json.loads(raw) if raw else {}


def _run(fn):
    try:
        print(json.dumps(fn(_cfg(), _inputs())))
    except urllib.error.HTTPError as e:
        print(json.dumps({"error": "HTTP " + str(e.code), "detail": e.read().decode("utf-8", "replace")}))
        sys.exit(1)
    except Exception as e:
        print(json.dumps({"error": str(e)}))
        sys.exit(1)


q = lambda v: urllib.parse.quote(str(v), safe="")


def main(cfg, inputs):
    index = inputs.get("index")
    if not index:
        raise Exception("index is required")

    message_id = inputs.get("message_id")
    if not message_id:
        raise Exception("message_id is required")

    return request("GET", "/messages/" + q(index) + "/" + q(message_id), cfg)


_run(main)